Evidence map›Paper›PMID 32558256›Full record

ArticleAlzheimer's & dementia : the journal of the Alzheimer's Association2020

Actigraphy-estimated sleep and 24-hour activity rhythms and the risk of dementia.

Thom S Lysen, Annemarie I Luik, M Kamran Ikram, Henning Tiemeier, M Arfan Ikram

Open access · hybridAbstract read
In one paragraph

Article in Alzheimer's & dementia : the journal of the Alzheimer's Association, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 60 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
60citing papers in PubMed, 4 pooled it
6.4field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

60 citing papers in PubMed, 4 syntheses or guidelines pooled it, 80 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Pooled it
  5. Trial
  6. Trial
  7. A gradual and sustainable approach to diagnosing sleep and circadian disturbances in dementia.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026
    Review
  8. Article
  9. Characterizing circadian rest-activity rhythm patterns across Alzheimer's disease continuum in Down syndrome.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026
    Article
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  12. Sleep deprivation exhibits an age-dependent effect on infraslow global brain activity.Proceedings of the National Academy of Sciences of the United States of America · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 2 countries.

Thom S LysenDepartment of Epidemiology, Erasmus MC, University Medical Center, Rotterdam, the Netherlands.
Annemarie I LuikDepartment of Epidemiology, Erasmus MC, University Medical Center, Rotterdam, the Netherlands.
M Kamran IkramDepartment of Epidemiology, Erasmus MC, University Medical Center, Rotterdam, the Netherlands.
Henning TiemeierDepartment of Social and Behavioral Science, Harvard TH Chan School of Public Health, Boston, Massachusetts, USA.
M Arfan IkramDepartment of Epidemiology, Erasmus MC, University Medical Center, Rotterdam, the Netherlands.
Erasmus MC · NLHarvard University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionWe investigated and compared associations of objective estimates of sleep and 24-hour activity rhythms using actigraphy with risk of dementia.

methodsWe included 1322 non-demented participants from the prospective, population-based Rotterdam Study cohort with valid actigraphy data (mean age 66 ± 8 years, 53% women), and followed them for up to 11.2 years to determine incident dementia.

resultsDuring follow-up, 60 individuals developed dementia, of which 49 had Alzheimer's disease (AD). Poor sleep as indicated by longer sleep latency, wake after sleep onset, and time in bed and lower sleep efficiency, as well as an earlier "lights out" time, were associated with increased risk of dementia, especially AD. We found no associations of 24-hour activity rhythms with dementia risk. DISCUSSION: Poor sleep, but not 24-hour activity rhythm disturbance, is associated with increased risk of dementia. Actigraphy-estimated nighttime wakefulness may be further targeted in etiologic or risk prediction studies.

Indexed as

ActigraphyAgedAlzheimer DiseaseCircadian RhythmFemaleHumansLongitudinal StudiesMaleNetherlandsProspective StudiesSex FactorsSleepSleep Latency24-hour activity rhythmsactigraphyAlzheimer's diseasecohortdementiaepidemiologylongitudinalpopulation-basedprospectiverest-activity rhythmssleep

Identifiers

PMID32558256
PMCPMC7984295
OpenAlexW3035981959

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.